Question

Which of the following is a characteristic symptom of Down syndrome?

• A. Abnormal growth of hair.
• B. Heart murmurs.
• C. Skin rash.
• D. Eye color changes.

Hint:

Down syndrome is caused by trisomy of chromosome 21 and is often associated with congenital heart defects, intellectual disabilities, and distinct facial features.

Answer 1

The Correct Option is B

Step 1: Overview of Down syndrome. 
Down syndrome is a genetic disorder caused by trisomy of chromosome 21. It is associated with a variety of physical, developmental, and physiological abnormalities. 

Step 2: Characteristic symptoms. 
Common symptoms of Down syndrome include Heart defects, such as heart murmurs. Flattened facial profile and upward slanting eyes. Intellectual disability and developmental delays. 

Step 3: Analysis of options. 
Option (A): Incorrect. Abnormal hair growth is not a characteristic symptom. 

Option (B): Correct. Heart murmurs are commonly associated with congenital heart defects in individuals with Down syndrome. 

Option (C): Incorrect. Skin rash is not a typical symptom.

Option (D): Incorrect. Eye color changes are unrelated to Down syndrome. \[ \therefore \text{The correct answer is: Heart murmurs.} \]